i965/nir: Add new utility method brw_glsl_base_type_for_nir_type()

This method returns the glsl_base_type corresponding to a nir_alu_type.
It will factorize code currently present in fs_nir, that can be reused
in vec4_nir on its upcoming emit_texture support.

Reviewed-by: Jason Ekstrand <[email protected]>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_nir.c b/src/mesa/drivers/dri/i965/brw_nir.c
index beb7d6912c8..49d17422546 100644
--- a/src/mesa/drivers/dri/i965/brw_nir.c
+++ b/src/mesa/drivers/dri/i965/brw_nir.c
@@ -216,3 +216,24 @@ brw_type_for_nir_type(nir_alu_type type)
 
    return BRW_REGISTER_TYPE_F;
 }
+
+/* Returns the glsl_base_type corresponding to a nir_alu_type.
+ * This is used by both brw_vec4_nir and brw_fs_nir.
+ */
+enum glsl_base_type
+brw_glsl_base_type_for_nir_type(nir_alu_type type)
+{
+   switch (type) {
+   case nir_type_float:
+      return GLSL_TYPE_FLOAT;
+
+   case nir_type_int:
+      return GLSL_TYPE_INT;
+
+   case nir_type_unsigned:
+      return GLSL_TYPE_UINT;
+
+   default:
+      unreachable("bad type");
+   }
+}